Study On Revolving Jet Eliminate Surface Soil Of Shallow Submersion And Related Mechanism

Revolving jet flow is proliferation type jet flow that forms under the condition which the spray nozzle does not revolve with the three dimensional speed, jet flow particle alongs spiral line path movement,and it is one kind of compound flowing of the open jet adding revolving, its flowing situation is more complex, mostly is at the turbulent state. The revolving jet is atechnique method of using the water to eliminate shallow submersion land mine surface, this technology research and the application not only raise efficiency of the mine clearance, but also further expand application scope of the water jet .At present, the main method of removing mines as follow: electromagnetism mine clearance, radar mine clearance, new acoustics mine clearance as well as rocket propulsion mine clearance and so on. The water jet flow mine clearance technology is one mine clearance method which recently emerged, presently, it is still in the exploratory phase and lack of systematic theoretical and applied research. This article depends on the theoretical analysis and the laboratory simulation experiment, carefully research on the structural design, breaking ground the theory and the experiment analysis.By using of the high-pressured water fluid technology exploration, the mine clearance has the outstanding feature: First, the aqueous medium transmission convenience, which is advantageous of realizing the long-distance range and the field work. Second ,the nozzle and the target are at the non-contact condition in the work process, thus is advantageously realizes the light to control, the numerical control or the manipulator control; Third, it will not have the high temperature, the spark, the dust, and will not change the material mechanics, physics and the chemical properties during the work process, so, it is the only one of cold finishing method at present . Thus it can be seen, the high-pressured water fluid technology suits especially in the flammable explosive dangerous environment carries on the work.Based on the revolving water jet flow theory and soil mechanics theory, by means of the action of the jet flow to the soil body surface and the mechanism of the revolving jet flow breaking ground analysis ,and the thoughts of which the action pressure of jetting is basic external factor of the soil body destruction, but the soil body critical destructive power to soil body is determined by its internal factors that physical and mechanical properties of the soil, only then, when the jet flow action is greater than the soil body the critical destructive power, the soil body only then possibly has the destruction. Established indoor has simulated the test platform, the test result indicated that enhanced the revolving jet flow to break ground the effect to increase the jet flow power,and enhanced the jet pressure to the effect enhancement which broke ground is very obvious. The target is apart from the choice to breaks ground the effect relations ,also to be able through the experimental determination.By means of the revolving jet flow's law of motion and breaking ground the mechanism analysis of the article , using a combination way of the theory and the experiment to systematically discuss the new water jet flow mine clearance technology ,and it has very important the theory and the practical significance in exploring the new mine clearance technology and the method.